<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script type="text/javascript">
			let person={
				name:'张三',
				sex: '男',
				age: 18,
			}
			
			// Object.defineProperty(person.'age',{
			// 	value:18,
			// })
			console.info(person);
		</script>
	</body>
</html>
